I am affraid that you must have some files installed before use Elephant Node Editor! ;)
Generally i ask to put all the folder Nodeeditor because there are several versions for be sure to use the .nod posted! ;) ....

After this done...

Maybe you must try some easy things for understand how all that works! :)

Take a look here for a very simple and detailed example (in French - I don't remember if I made the same in English)

http://moi3d.com/forum/index.php?webtag=MOI_FRANCAIS&msg=471.62

(must be readable with a translater! ;) https://www.deepl.com/translator






Ps Alas i have no time for this special sport for the moment... :(